Showing papers by "Graciela B. Gelmini published in 1999"
TL;DR: In this article, a realistic model to produce a very large lepton asymmetry L ⋍ 10 −2 −1 without producing a large baryon asymmetry is presented.
64 citations
TL;DR: Rel neutrinos with mass in the range consistent with Super-Kamiokande data, can explain the cosmic rays with energies in excess of the Greisen-Zatsepin-Kuzmin cutoff.
Abstract: Relic neutrinos with mass ${0.07}_{\ensuremath{-}0.04}^{+0.02}\phantom{\rule{0ex}{0ex}}\mathrm{eV}$, in the range consistent with Super-Kamiokande data, can explain the cosmic rays with energies in excess of the Greisen-Zatsepin-Kuzmin cutoff. The spectrum of ultrahigh energy cosmic rays produced in this fashion has some distinctive features that may help identify their origin. Our mechanism does not require but is consistent with a neutrino density high enough to be a new kind of hot dark matter.
54 citations
TL;DR: In this paper, it was shown that the flatness of the potential is spoiled by supergravity corrections, that is the slow-roll parameter η gets contributions of order unity.
16 citations